Vacuum cleaner



FIG. 1 is a top perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is an elevational view of one side thereof, the other side being a mirror image;

FIG. 4 is a rear end elevational view thereof. 

The ornamental design for a vacuum cleaner, substantially as shown and described. 